Possible BGP hijack

Beginning at 2019-10-13 18:58:43 UTC, we detected a possible BGP hijack.

Prefix 167.173.10.0/23, is normally announced by AS3769 HEARST-AS - Hearst Magazines, Inc., US.

But beginning at 2019-10-13 18:58:43, the same prefix (167.173.10.0/23) was also announced by ASN 52871.

This was detected by 18 BGPMon peers.

Expected
Start time: 2019-10-13 18:58:43 UTC
Expected prefix: 167.173.10.0/23
Expected ASN: 3769 (HEARST-AS - Hearst Magazines, Inc., US)
Event Details
Detected advertisement: 167.173.10.0/23
Detected Origin ASN 52871 (TASCOM TELECOMUNICAÇÕES LTDA, BR)
Detected AS Path 63956 3491 58453 7738 7738 52871
Detected by number of BGPMon peers: 18

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